IRIS foetidissima var. citrina

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IRIS foetidissima var. citrina

Iris
Select Item No. IA097

Available

One Portion is usually sufficient for approx. 50 plants.
Please switch to gram for larger quantities.



Plant Description

Life Cycle: Perennial
Family: Iridaceae
Origin: Western Europe, northern Africa to Greece: open woodland and woodland edges.
Special Features: Orange-red berries.
 
Basic Colour: (yellow / gold)
Flower Colour: yellowish flowers with blue tinge
Natural Flowering Period: June - July
 
Winter Hardiness Zones: Z6 - Z9
Foliage: dark green
Growth Habit: rhizomatous
Height with Flowers: 60 cm
Soil Requirements: dry / average
Location:
Characteristics: decorative fruit
Usage: suitable for cutting
Grams per 1000 seeds: 90.90909 Gram
Seeds per Gram
(does not correspond to the number of plants!):
11
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
100 Gram
Sowing Direction:

(1) Cold-germinators are still referred to as frost-germinators, although this isn’t quite correct. The sowing must be kept warm (about +18 to +22°C) [about 64 to 72°F] and moist for the first 2–4 weeks. After this period the sowing must be kept at a cold temperature (between –4 and +4°C) [between 25 and 39°F] for another 4–6 weeks. Colder temperatures of –5°C [23°F] are only advantageous for most species of the Ranunculus family. It is not so important if the temperature is higher or lower during the cooling period, but the cooling period has to be prolonged because the synthesis of the germination inducer, hormon-like acid, slows down or comes to a standstill.
It is beneficial to cover the sowing with snow during the cooling-period. The temperature below it usually keeps in the optimum range of –4 to 0°C [25 to 32°F]. The sowing is kept moist, and the melting snow helps to destroy the shell, which is advantageous for the germinating seedling. After this cooling-period the sowing may not be immediately exposed to high temperatures. The most effective temperatures are between +5 to +12°C [41 to 54°F], even if germination has started. The best location for this sowing, even in March, April and May, is the open field, the cold frame or a cold greenhouse.

(10) For these bigger hard-shelled seeds, mechanical damaging of the shell is helpful for quicker swelling. One method is to grind the seed in dry sharp sand. They can also be treated for several hours in a “softener” (Polyethylenglycol 6000), which is used for the production of plastic material.

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